Anthraquinone-benzacridone vat dyestuffs



Patented Apr. 15, 1941 ICE ANTHRAQUINONE-BENZACRIDON E VAT DYESTUFFS Wilhelm Bauer, Leverkusen-Wiesdorf, and Bernhard Bollweg, Leverkusen-I. G.-Werk, Germany, assignors to General Aniline 85 Film Corporation, a corporation of Delaware No Drawing. Application April 18, 1939, Serial No. 268,528. In Germany May 2'7, 1938 1 Claim.

The present invention relates to new vat dyestufi's of the anthraquinone series.

We have found that vat dyestuffs corresponding to the general formula:

wherein A stands for anthraquinone, the linkages of the imino group between the two anthraquinones are attached to a-pOSitiOnS and the second linkage to adjacent ,B-positions, X1 stands for hydrogen or halogen and X2 stands for hydrogen, alkyl, alkoxy, aryloxy orhalogen represent valuable vat dyestuffs. It is to be pointed out that the general formula given above and in the appended claim is considered to cover also compounds in which an anthraquinoneacridonecarbazole radical is linked on the anthraquinone A. The new compounds represent dark powders which dissolve in concentrated sulfuric acid with a blue violet color and which dye vegetable fibers from a bordo-red vat in very fast clear yellowishbrown to olive-brown and red-brown shades.

. They are especially distinguished by a great affinity to the vegetable fiber.

The process for the manufacture of the new dyestuffs consists in condensing by means of acid condensing agents in the presence of a suitable organic or inorganic solvent anthraquinone-2.1- N-1'.2-N-benzacridones, which are substituted in Bz6-position by an ct-amino-1.1'-dianthrimide radical or by an a-amino-1.1-anthrimidecarbazole radical and which do not possess in orthoposition to the anthrimide nitrogen atoms substituents which prevent ring formation. If necessary, the reaction products may be subjected to an aftertreatment with oxidizing or aroylating agents.

As acid condensing agents there have proved especially suitable anhydrous aluminum chloride in the presence of, for instance, nitrobenzene or sulfur dioxide. When started from anthraquinone-2.l-N-1.2'-N-benzacridones the B26- position of which is substituted by an a-amino- 1.1'-dianthrimide radical, for instance, a compoundof the following type:

t t then carbazolization occurs between the B2- nucleus and the aminoanthraquinone radical in 6'-position as well as between the two anthraquinone radicals B and C. The carbazole ring formation takes place at temperatures between and 0. very easily. At first intermediate products with a higher hydrogen content are obtained which, by a treatment with oxidizing agents, for instance, chlorine lye, are converted into the corresponding final products. In case aroyl radicals have been split ofi during the condensation or starting materials have been employed bearing free amino groups, the carbazoles may be subsequently aroylated by heating with acid chlorides.

The starting materials employed may be obtained, for instance, by causing to act with aaminO-LY-dianthrimid-es or a-amino-Ll -anthrimidecarbazoles upon B26 -halogenanthra quinone-2.1-N-1'.2'-N-benzacridones or by the reaction of B26-aminoanthraquinone-2.1-N-l'.2'-

N-benzacridones upon a-halogen-Ll dianthrimides or the carba'zoles thereof. A further method consists in replacing the Bz6'-position of an acridone by an a-aminoanthraquinone radical containing in'a further a-po'sition a free amino group or a halogen and acting with this compound upon anzit-halogen, a-aminoanthraquinone respectively.

lI'he following examples illustrate our invention without, however, restricting it thereto, the parts being by weight:

Example 1 24 parts of 1.5-diaminoanthraquinone, 40.5 parts of 3'.6-dichloroanthraquinone-2.l-N-l'.2- N-benzacridone, 7.5 parts of anhydrous potassium carbonate, 2 parts of copper acetate and 800 parts of naphthalene are heated at 190-200" C. for 2-3 hours while vigorously stirring. Then 38 parts of 1-chloro-5-benzoylaminoanthraquinone,

. 8 parts of anhydrous potash and 2 parts of cop'- per acetate are added and heated at 210 C. while stirring for 5 hours. When cool the product is diluted with chlorobenzene and filtered with suction in the heat. The precipitate is washed in the following order with chlorobenzene, then with some acidified water to remove the inorganic salts, and finally with hot water and dried. The trianthrimide thus obtained dissolves in concentrated sulfuric acid with an orange-red color. Violet flakes, yielding a current-colored vat and dyeing the fiber dull violet shades, separate by pouring the solution into water.

For effecting condensation 80 parts of the trianthrimide are stirred into a solution of 200 parts of anhydrous aluminium chloride in 800 parts of nitrobenzene at 60 C. An olive-green solution is formed with faint evolution of heat. A test portion diluted with alcohol turns black. The whole is heated and the flame so regulated that within half an hour a temperature of 90 is reached, whereby hydrochloric acid is evolved and kept at this temperature for hour. The

color of the melt turns greenish-blue and a test portion diluted with alcohol turns bright blueviolet. When cool, the melt is poured into icewater, and then distilled with steam until all nitrobenzene has been expelled. The dyestufi having the following formula:

is finely distributed in water and oxidized after adding some caustic soda lye with; an excess of chlorine lye, sucked off, washed and dried. It represents a dark powder, which dissolves in concentrated sulfuric acid with blue color. By pouring into water the solution brown flakes are separated. The dyestufl yields an easily soluble bordo-red vat with an alkaline hydrosulfite solution, which dyes the vegetable fiber clear, pure brown shades of excellent fastness properties.

A similar dyestufi is obtained by treating the above-mentioned trianthrimide after the process of application Ser. No. 229,328 to an acid condensation.

Example 2 A product identical with the above-mentioned dyestufi is obtained by heating 18.7 parts of 3- chloro 6' aminoanthraquinone- 2.1--'.N-1 .2-N benzacridone, 14 parts of 1.5-dichloroanthraquinone, 4 parts of potassium carbonate, 1 part of copper acetate, 400 parts of naphthalene to 195- 200 C. for 2 hours with stirring, then adding 18 parts of 1-amino-5-benzoylaminoanthraquinone, 4 parts of potash and 1 part of copper acetate and heating to 210 C. for 4 hours, The trianthrimide is worked up and condensed with aluminium chloride as described in Example 1.

Example 3 19.5 parts of 3-methoxy-6-chloroanthraquinone-2.l-N-1.2'-N-benzacridone, 12 parts of 1.5- diaminoanthraquinone, 3.7 parts of potassium carbonate, 1 part of copper acetate and 400 parts of naphthalene are heated to 200 C. for 2 hours with stirring. Then 18.5 parts of 1-chloro-5- benzoyl-aminoanthraquinone, 4 parts of potassium carbonate and 1 part of copper acetate are added and heated at 210 C. for 5 hours with stirring. After diluting with chlorobenzene, the precipitate is sucked off in the heat and washed in the usual manner with organic solvents subsequently with acidified water, and finally with hot water and dried. The trianthrimide represents a dark powder, soluble in concentrated sulfuric acid with a yellowish-brown color. Dull violet flakes separate by pouring the solution into water.

For effecting condensation 30 parts of the trianthrimide are added to a solution of parts of aluminium chloride in 300 parts of nitrobenzene. Heat is evolved the temperature rising to 50-80 C. The melt is maintained for about half an hour at 80 C. The solution is at first olive, then it turns green, A small test portion diluted with alcohol shows in the beginning of the condensation a blue, and at the end a blue-violet color. When cool the melt is poured into ice- Water, the nitrobenzene is distilled with steam and the dyestufi having the following constitution:

0 o Nnoo 0 EN N i I H o H N :0

is filtered with suction and rinsed with hot water. Finally it is stirred to a paste with warm water with chlorine lye, oxidized after adding some soda lye, filtered with suction, rinsed and dried. It represents a dark powder, which dissolves in concentrated sulfuric acid with blue color and dyes the fiber from a bordo-red vat fast olivebrcwn shades.

Example 4 15.2 parts of 5.5'-diamino1.1'-dianthrimidecarbazole (obtained by reaction of 1-amino-5 benzcylaminoanthraquinone with 1-chloro-5-benzoylaminoanthraquinone, acid condensation as described in German Patent 239,544 and splitting oiT the two benzoyl residue with weakly diluted sulfuric acid), 13 parts of 3'.6'-dichloroanthraquinone-2.l-N-l.2-N-benzacridone, 2.5 parts of potassium carbonate, 0.75 part of copper acetate and 200 parts of naphthalene are heated to boiling for 20 hours with stirring. Then the melt is diluted with o-dichloro-benzene, the dyestuif filtered with suction in the heat and the precipitate washed in the usual manner. It dyes the fiber from a brown vat currant shades.

For effecting condensation 25 parts of the above mentioned dyestuff are stirred into a solution of '75 parts of aluminium chloride in 250 parts of nitrobenzene and heated to IOU- for one hour. Then the nitrobenzene is distilled oil with steam and the dyestuff separated, washed and dried. It contains a free amino group. For aroylating the amino group, 25 parts of the finely powdered product are heated with 250 parts of nitrobenzene and 15 parts of fl-naphthoyl chloride at 200 C. for 2 hours, until evolution of hydrochloric acid has ceased. The dyestuff is sucked off in the heat, washed and dried. It has the following constitution:

OIO/G/K IK AOi/ It represents a dark brown powder, which dissolves in concentrated sulfuric acid with a greenwith suction in the heat in the usual manner and ish-bluecolor. Brownfiakes separate by pouring" dyestuif, which has the following constitution: the solution into Water. The dyestuff dyes the fiber from a loordo-red vat yellow-brown shades CF w of excellent fastness properties. 1

Example 5 9 parts of 5.5'-diamino-1.1'-dianthrimidecar- 0 EN l H bazole (compare Example 4), 16 parts of 4'.6- II I 00 dichloroanthraquinone-2.1 N 1'.2'-N-benzacri 0 done, 3 parts of potassium carbonate, 0.5 part of copper acetate and 200 parts of naphthalene are heated to 210 C. for 10 hours with stirring. Then I 0 the melt is diluted with chlorobenzene, filtered is separated in the usual manner, oxidized with dried For effecting condensation 21 parts of alkaline chlorine lye, filtered with suction, rinsed the t-rianthrimide are added to a solution of 70 l V parts of aluminium chloride and 210 parts of i t i jgg fi 2 22355 horde red Vat fast ye} nitrobenzene and heated to 90 C. for 2 hours,

whereby the color of the solution turns from Example 7 olive to green-blue. The nitrobenzene is distilled 8 P s Of y 0- 'anwith steam and the dyestufi, which .has the folthrimidecarbazole (German Patent 491,428) 1 -5 lowing constitution: parts of 3'-methoxy-6'-chloroanthraquinone-2.1-

N HN/ O: I NH 0 H I I H H 0 A c=o 0 c l \O/ KK r t a l t is separated in the usual manner, finely dispersed, dOne, 2.5 par of Potassium oxidized with alkaline chlorine lye, filtered with carbonate, 05 part O 1 1 acetate and 200 suction, washed and dried. It represents a dark parts of naphthalene are heated at 210 C. for .10 b w wd r, th hydrosulfite vat, of whi h hours. The melt is diluted with o-chlorobenzene, possesses a great aflinity for the vegetable fiber. the reaction product filtered with suction 1131 the It dyes cotton in very fast, clear reddish-brown heat, Washed and ied in he usual Way. The brown-red solution in concentrated sulfuric acid Elmample 6 separates, when diluted with water, olive-grey flakes. For effecting condensation 23 parts of the 25 parts of 5-aminol.1'-dianthrimidecarbazole 4: anthrimide are heated with a solution of 46 parts (obtained by carbazolization of the reaction prodof aluminium chloride in 200 parts of nitrobenuct of 1 amino-5-benzoylaminoanthraquinone zene at 75-80" C. for one hour, until a small test with l-chloroanthraquinone, described in German portion diluted with alcohol has been turned from Patent 451,495, and splitting off the benzoyl green-blue to violet-blue. The dyestuff of the group by heating with weakly diluted sulfuric 50 following formula:

omo- O 0 acid), 25 parts of 3'.6-dichloroanthraquinoneis separated in usual manner. It dissolves in con- 2.1-N-1'.2'-N-benzacridone, 5 parts of potassium centrated sulfuric acid with a dull violet color. carbonate, 1 part of copper acetate and 300 parts The solution separates when diluted with water of naphthalene are heated to 205C. for 22 hours brown flakes. The pr yields from a hordewith stirring, Then the melt is diluted with red vat deep, red i r w Shades f very ood chlorobenzene, the precipitate filtered with sucfastness pro tion in the heat, washed and dried. The red- Example 8 brown sulfuric acid solution separates grey-brown 12 parts of 14-diaminoanthrmumone, parts flakes, when diluted with water. For effecting of 3".6'-dichloroanthraquinone-2.l N 1.2' condensation 39 parts of the dianthrimide are benzacridone, 3.7 parts of anhydrous potassium heated with a solution of parts of aluminium carbonate and 1 part of copper acetate are chloride in 400 parts of nitrobenzene for 1% hours stirred into 400 parts of naphthalene at at 100 0., whereby the color of thesolutionturns 200 C. for 2 hours. After forming the anfrom brown-red to a clear greenish-blue. The thrimide, 18.5 parts of l-chloro-4-benzoylaminoanthraquinone, 4 parts of potassium carbonate and 1 part of copper acetate are added. After stirring for 5 hours at 215 C. the melt is diluted with chloro-benzene, the dianthrimide is filtered with suction, washed with chloro-benzene and pyridine, extracted by boiling with diluted hydrochloric acid, filtered with suction, washed and dried.

For efiecting condensation 20 parts of the anthrimide in a solution of 50 parts of aluminium chloride are stirred in 300 parts of nitrobenzene at 140 C. for several hours. The progress of the reaction may be determined by tests which are diluted with alcohol. At the beginning they show a pure blue, at the end a dull bluish-red color. The melt is worked up by pouring into diluted hydrochloric acid, the nitrobenzene dis- II I o tilled with steam, the dyestuff of the following constitution:

H5 C 5- C O-NH O HN I H :0 3 I (3:0 0: \O I O is filtered with suction, finely dispersed and then oxidized with diluted warm chlorine lye in a weakly alkaline solution, filtered with suction, washed and dried. It dyes cotton from the vat currant-colored shades.

Example 9 The dyestufi of the following constitution:

is obtained by replacing l-chloro-i-benzoylaminoanthraquinone, described in Example 8, by l-ch1oro-5-benzoy1amino-anthraquinine and working as described in the above-mentioned example. It dyes cotton from the vat reddishcurrant shades.

Example 10 A dyestufi of the following formula:

UICO 2/ 1 Q I Example 11 The dyestuif of the following formula:

is obtained by replacing in Example 1 the 3'- chloro 6'- chloroanthraquinone 2l1- N-l'.2-N- benzacridonehy the equivalent quantity of 3'- methyl-S-chloroacridone (compare Example 6 of German Patent 619,080). It represents a darkbrown powder, which dissolves in concentrated sulfuric acid with a greenish-blue color and dyes cotton from a bordo-red vat deep, yellowishbrown shades of excellent fastness properties.

is obtained When replaced in Example 6 the 5-amino-1.l-dianthrimidecarbazo1e by the equivalent quantity of 5-amino-6'-ch1oro-1.1-dianthrimidecarbazole (obtained by conversion of the 1-amino-6-chloroanthraquinone with l-chloro- 5-benzoylaminoanthraquinone, carbazolization of the anthrimide after the process of German Pat ent 451,495 and splitting off the benzoyl group by heating with weakly diluted sulfuric acid) and used instead of the 3.6'-dich1oroanthraquinone-2.1-N-1.2-N-benzacridone the same quantity of 4.6-dichloroanthraquinone-2.l-N- 1'.2-N-benzacridone. It yields from a bordored fast yellow-brown shades.

We claim: A vat dyestuif having the formula:

which product is a dark powder dissolving in concentrated sulfuric acid to a blue solution, yielding a bordo-red vat and dyeing vegetable fibers from the vat fast, clear, pure, brown shades.

WILHELM BAUER. BERNHARD BOILWEG. 

